In this section, we explore how malnutrition and infections are closely linked, presenting a major health concern for infants and young children. Factors like poverty, illiteracy, and limited access to healthcare exacerbate malnutrition rates, especially when breast milk is no longer available in adequate amounts. We review significant nutritional deficiencies, including Protein-Energy Malnutrition (PEM), anemia, nutritional blindness due to vitamin A deficiency, rickets from vitamin D deficiency, and goitre from iodine shortage. The section also discusses the interplay between malnutrition and communicable diseases, emphasizing the critical role of immunization and hygiene in improving health outcomes. The text stresses the need to address these health challenges to protect children’s well-being effectively.